Stovepipe



sTovEPiPE v E. R. Hlsl-:Y ET AL Filed June 18, 1925' Aug. 1l, 1925.

m T m E.. f

O C. Pari-TON 3' 0 ATTORNEY.

Patented Ang., Il, 1925.

EDWIN R. HISEY, OF GUERNSEY, WYOMING, AND OLIVER C. EATTON, OF DENVER COLORADO.

STOVEPIPE.

Application filed June 18, 1923. Serial No. 646,141.

To all 'whom t may conce/m Be it known that we, EDWIN R. IrIrsnY and OLIVER C. PArroN, citizens of the United States, residing at Guernsey, in the county of Platte and State of Wyoming, and Denver, in the county of Denver and tritate of Colorado, respectively, have invented certain new and useful Improvements in Stovepipes, of which the following is a specification.

@ur invention relates to improvements in stove pipes and its principal object is to provide a sectional pipe of the usual size and form. with simple and highly efficient means for locking its telescoping members in a selected position with relation to each other and a further object of the invention resides in the provision of means for closing the joint between the sections of the pipe against the escape of smoke and soot.

I'Vith the above and other objects in view all of which will be fully disclosed in the course of the following description, our invention consists in the construction and combination of parts shown in their preferred form in the accompanying drawing in which like characters of reference designate corresponding parts throughout the several views and in which Figure 1 represents in elevation, a sectional stove pipe of 'our improved construction;

Figure 2, a fragmentary much enlarged section along the line 2 2, Figure 1;

Figure 3, a similarly enlarged elevation of the parts of the invention adjacent the joint between the members of the stove Pipe;

Figure 4, a section taken on the line 4 4, Figure 3;

Figure 5, a still further enlarged section on the line 5 5, Figure 1; and

Figure 6, a section on the line 6 6, Figure 3.

Referring more specifically to the drawings, the reference numerals 5 and 6 designate two telescoping members of a length of sectional stove pipe of conventional size and form.

Each section is as usual, formed of a cylindrically bent piece of sheet metal, the lapping edge-portions of which are crimped together.

In order to provide a convenient means for closing the joint between the two members against the escape of smoke and soot, the lapping edge-portions of the outer section are separated at its end at which it adjoins the other section and the outer lap is partially cnt away as indicated at 7 in Figures 1 and 3, to permit lof contraction of the section for the purpose of causing it to snugly engage with the inner section.

In order to attain this result, the outer section is provided with means to forcibly contract the ends at which its lapping edge portions are separated and to securely hold it in its contracted condition.

The means provided for this purpose as shown in the drawings, consist of two ratchet bars 8 and 9 which are pivoted at opposite sides of the joint between t-he lapping edges of the sections and relatively disposed for the interlocking engagement of their teeth. One of the bars has at its free end an outwardly projecting stud 1() and the other bar has a series of holes 12 to receive a laterally extending stud 13 on a lever 141- by means of which the bars may be drawn together.

In the operation of the contracting device, the lever is placed against the stud on the bar 9 with its own stud in one of the apertures 12 of the other bar, and by using the stud 10 as a fulcrum, the bar is turned and by its movement causes the beveled outer portion of lthe pipe section 6 to move upon the inner section until the pipe has been contracted to the desired extent.

After the lever has been removed, the two ratchet bars co-operate to maintain the end of the section in its contracted condition.

rIhe length of the pipe is adjusted by moving the telescoping sections one upon the other, and in order to lock the sections in their relative adjusted positions, we provide the inner member with a longitudinally extendingl rack 15 and mount upon the other member a spring-pawl 16 adapted to engage with the teeth of the rack.

The rack on the member is preferably formed by upsetting the metal thereof and it comprises, as best shown in Figure 5 of the drawings, two parallel sides 15a and equidistantly spaced transverse ridges 15 which constitute the teeth of the rack engaged by the pawl. The sides of the rack extend above the plane of the teeth to provide flanges which prevent lateral displacement of the pawl and facilitate the movement of the section on which the rack is formed, inside the other.

The outer section has a lengthwise e"- tending recess 17 likewise formed by up setting its metal in a stamping press or the like, which admits the rack when the sections are longitudinally adjusted. The pawl consisting in its preferred form of a strip of bent sheet-metal, is pivoted inside the recess of the outer section for convenience in construction, by the same pin 1S which serves as a pivot for the ratchet bar t), and its portion projecting beyond the end of tlie section has a detent 16a adapted to tit within the interdental spaces of the rack, and a thumb-piece 16c which facilitates its withdrawal from the rack.

Havingr thus described our invention, it will be readily apparent that the rack and the pawl on the telescoping;` sections co-operate to lock them in any selected position to which they are adjusted with relation to each other, and that the contracting ap pliance as shown and described, provides a convenient means for closing the joint between the sections after the adjustment has been made.

Our invention thus provides a practical and serviceable medium for fitting a length of stove pipe between other members of a conduit of'which it is a constituent part,

and both the locking appliance and the contraction means aid in forming a rigid and impervious structure after the required adjustments have been made.

lVhat we claim and desire to secure by Letters Patent is:

l. A conduit comprisintg` telescoping sections one of which has a longitudinal. recess open at an end thereof, and the other of which has a series of teeth between parallel side walls which project above the surface of the section and lit slidably inside the recess of the other section, and a pawl pivoted in the recess and adapted to co-op-A erate with the teeth for lockingthe sections in their adjusted positions, the outer section being` adapted to be contracted upon the other section.

2. A conduit comprising telescoping see-- tions one of which has a longitudinal recess open at an end thereof, and the other of which has a series of teeth between parallel side walls which project above the surface of the section and lit slidably inside thc recess of the other section, and a pawl pivoted in the recess and projecting' partially outside the same for cti-operation with the teeth to lock the sections in their ail-- justed positions, the outer section being adapted to be contracted upon the other scction.

3. A, conduit comj'irising' telescopica' and longitudinally adjustable sections the outer one of which has longitudinal edges disconnected at an end thereof for its contractioiii, bars pivoted on the outer section at opposite sides of said longitudinal edges and provided with series of interlocking; teeth, and lever means for moving' said bars relative to each other to vary the degree of contraction of the section on which they are pivoted.

4. A conduit comprising telescoping and longitudinally adjustable sections the outer one of which has longitudinal edges disu connected at an end thereof for its contraction, bars pivoted on the outer section at' opposite sides of said longitudinal edges and provided with series of interlockingteeth, and a lever removably fulcruincd on one of the bars and bearing upon the other bar to contract the section on which the bars are pivoted by varying their relative position.

In testimony whereof we have affixed our signatures.

EDlVIN R. HISEY. OLIVER C. PATTON. 

